KINGOU Blue Wooden Fifteen Oblique Sticks Puzzle Brain Teaser Puzzles Blue Fifteen Oblique Sticks . Material: Quality timber. Size: 2.95 x 2.95 x 2.95 inch. Difficulty Rated:  . Recommended for ages 5 & up, children should be used under adult supervision, water-based paint, touch smooth. Brain Teasers Maze: A huge challenge, brain teasers for kids, even brain teasers for adults ,It's proved to be challenging for a lot of people and definitely fun to watch the attempted tries to get it back to its original cube shape To make it challenging and fun, parcel without paper instructions, if you need solutions, please contact us.